Overview
The LM95233CISDX from Texas Instruments is an 11-bit digital temperature sensor equipped with a 2-wire System Management Bus (SMBus) interface. This sensor is designed to monitor the temperature of two remote diodes as well as its own local temperature. It is particularly useful for accurately monitoring the temperature of external devices such as microprocessors, graphics processors, or diode-connected transistors like the 2N3904. The LM95233 utilizes TruTherm BJT beta compensation technology to accurately sense thermal diodes in sub-micron processes (90nm or 65nm).
Key Specifications
| Parameter | Value |
|---|---|
| Local Temperature Accuracy | ±2.0 °C (max) |
| Remote Diode Temperature Accuracy | ±0.875 °C (max) |
| Supply Voltage | 3.0 to 3.6 V |
| Average Supply Current (1Hz conversion rate) | 0.57 mA (typ) |
| Operating Temperature Range | -40°C to 140°C |
| Package | 14-Pin WSON |
| Temperature Resolution | 0.125°C LSb (local), 0.03125°C LSb (remote with digital filter enabled) |
| Remote Temperature Ranges | +127.875°C/–128°C and 0°C/255°C |
Key Features
- Accurately senses die temperature of 2 remote ICs or diode junctions and local temperature.
- TruTherm BJT beta compensation technology for accurate sensing of sub-micron process thermal diodes.
- Programmable digital filters and analog front-end filter.
- Remote diode fault detection, model selection, and offset correction.
- Mask and status register support.
- 3 programmable TCRIT outputs with programmable shared hysteresis.
- Programmable conversion rate and shutdown mode with one-shot conversion control.
- SMBus 2.0 compatible interface, supports TIMEOUT.
- Three-level address pin allowing connection of up to 3 LM95233s to the same SMBus master.
- Power saving functions including programmable conversion rate, shutdown mode, and turn off of unused channels.
Applications
- Processor/Computer System Thermal Management (e.g., laptops, desktops, workstations, servers).
- Electronic Test Equipment.
- Office Electronics.
Q & A
- What is the LM95233CISDX used for?
The LM95233CISDX is used to monitor the temperature of two remote diodes and its own local temperature, making it suitable for thermal management in various electronic systems.
- What is the accuracy of the LM95233CISDX for local and remote temperature measurements?
The local temperature accuracy is ±2.0 °C (max), and the remote diode temperature accuracy is ±0.875 °C (max).
- What is the supply voltage range for the LM95233CISDX?
The supply voltage range is 3.0 to 3.6 V.
- What is the average supply current at a 1Hz conversion rate?
The average supply current is 0.57 mA (typ) at a 1Hz conversion rate.
- What is the operating temperature range of the LM95233CISDX?
The operating temperature range is -40°C to 140°C.
- What is the resolution of the temperature measurements?
The local temperature resolution is 0.125°C LSb, and the remote temperature resolution is 0.03125°C LSb with the digital filter enabled.
- Does the LM95233CISDX support multiple temperature ranges?
Yes, it reports temperature in two different formats for +127.875°C/–128°C and 0°C/255°C ranges.
- What are the key features of the LM95233CISDX's interface?
The LM95233CISDX has an SMBus 2.0 compatible interface, supports TIMEOUT, and includes a three-level address pin for connecting up to 3 devices to the same SMBus master.
- How does the LM95233CISDX manage power consumption?
The LM95233CISDX includes power saving functions such as programmable conversion rate, shutdown mode, and the ability to turn off unused channels.
- What applications is the LM95233CISDX commonly used in?
It is commonly used in processor/computer system thermal management, electronic test equipment, and office electronics.
